Assigm



Lila 1D FIP85G1 UNITED STATES PATENT OFFICE.

HERBERT C. DORR, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO THE DORE PAINT COMPANY, OF SAME PLACE.

MIXED SPECIFICATION forming part of Letters Patent No. 331,383, dated December 1, 1885.

Application filld March 31, 1884.

To all whom it may concern.-

Be it known that I, HERBERT O. Donn, a a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented a new and useful Composition of Matter to be used as a Paint, of which the following is a specifieation.

The compound which I employis composed of certain ingredients in about the proportions and applied in the manner hereinafter explained.

I take of a product'obtained from the dis tillation of coal-tar known in the arts as the oil of tar or dead-oil, one gallon, and heat it to about 150 Fahrenheit, and mix with it when in a heated state one pound of gum-shellac, or one-fourth (-l) pound each of gum-shellac, Burgundy pitch, gum-copal, and one pound of gum-Zanzibar. The gums should be pulverized and then intimately mixed with the dead-oil while hot, which acts as a solvent or menstruum for the gums. I then take of calomel three pounds, and ground gypsum an equal quantity in bulk to that of the calo- Inel, and triturate the same together in a mortar, and mix them with the melted gum and dead-oil above described. By this union or by uniting the caloinel wit-h the gymspm a powerful detergent is formed, which is de- Serial No. 126,237. (Specimens-l surface, while the hot-iron is only to be passed near the surface of the newly-painted parts.

ever, is hot-air applied through a suitable tube directed against or over the painted surfaces.

The action of the heat or fire expels or drives off the volatile matter and leaves the gums and oil to form an-enamel on the surface of the paint, which is much harder than the paint or surface would be if allowed to dry in the natural or usual way, and this glazed surface will resist the friction of the sea-water upon it, and retain the anti-fouling properties contained in the paint for a long time.

It will thus be seenthat any wooden, iron, or steel ship can be covered with the enameling paint in a very short time, and successive applications or coats made and dried one after at once and without loss of time, so common in using other marine paints.

It should here be observed that my paint compound can be used without the application of heat, and be allowed to dry and harder, in the usual manner, if desired.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is-

structive to and a ireventive of all livin The herein-described composition of matter for tions liable to foul the b ottoms of ships. to be used asa ships paint, consisting of the oil I0 1311mm II I- be added to obtain the desired color and consistence.

In order to quickly dry the paint and produce a hard and enameled surface, I employ heat, which may be applied in various ways, such as a flame or jet of gas, naphtha flame from a painters blast-lamp, red-hot irons, steam, or boiling water, the latter-the steam HERBERT C. DORR. [L. 5.]

\Vitnesses:

O. W. M. SMITH. W. P. COLEMAN.

The best heat of all which I have found, how- 4 or boiling water-to he applied directly to the another, and the vessel be got ready for sea 

